Kommander

2014 STX SCAB -

I have a Metra BT-5520 harness I am going to use to wire in my amp and subs to the factory STX HU. I know the white, gray, green and purple are for the speakers but I need to know which colors go to which speaker. And the ones with the black stripes are the ground, correct? I searched and Googled but I am finding conflicting information based on the year, trim level and HU models.

Kommander

I found this in another thread finally. Had to go back to 2009 to find it.

LF+ ------------------------------- white
LF- ------------------------------- white/black
RF+ ------------------------------- grey
RF- ------------------------------- grey/black
LR+ ------------------------------- green
LR- ------------------------------- green/black
RR+ ------------------------------- purple
RR- ------------------------------- purple/black

Complete thread with pics. Very helpful.
http://www.f150online.com/forums/200...head-unit.html